6 JEE Main 2015 Sequences and Series previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2015 previous-year questions from the Sequences and Series chapter of Mathematics. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Sequences and Series chapter hub.
If m is the A . M .   of two distinct real numbers I and n I ,   n > 1 and G 1 ,   G 2   and…
The sum of the 3 r d and the 4 t h terms of a G . P . is 60 and the product of its first three terms is 1000. If the fi…
If ∑ n = 1 5 1 n n + 1 n + 2 n + 3 = k 3 ,   then k is equal to:
The sum of first 9 terms of the series 1 3 1 + 1 3 + 2 3 1 + 3 + 1 3 + 2 3 + 3 3 1 + 3 + 5 + . . . is
The value of ∑ r = 16 30 r + 2 ( r - 3 ) is equal to:
Let the sum of the first three terms of an A.P. be 39 and the sum of its last four terms be 178 . If the first term of…